Sewing-machine



1. PARTMANN.

SEWING MACHINE.

APPLICATION NLE-D JuN'E 18. 191s.

Patented Feb. 17,1920.

4 SHEETS-SHEET l.

PARTMANN.

SEWING MACHINE.

APPLICATION F1LoJuNe1B.l91a.

Patented Feb. 17, 1920.

4 SHEETS-SHEET 2.

WITNESSES A TTOHNEYS 'II PARTMANN.

SEWING MACHINE.

APPLICATION FILED IuNE Is. |918.v

IQ Patented Feb 17,1920.

4 SHEETS-SHEET 3.

A TTORNEYS Panted Feb.17,192o.

4 SHEETS-SHEET 4 JOI-IN PARTIVIANN, OF NEW' YORK, N. Y.

SEWING-MACHINE.

Application led June 18, 1918.

To all Lo/0m t may concern Be it known that I, JOHN PARTMANN, a subject of the Emperor of Austl'ia--Iungary, and a resident of New York city, borough of Manhattan, in the county of New York and State of New York, have invented a new and Improved Sewing-hlachine, of which the following is a full, clear, and eX- act description.

My invention has for its object to provide a sewing machine, simple in construction and operation which is adjustable to make a straight or a zigzag stitch, as desired.

Additional objects of the invention will appear in the following specification in which the preferred form of my invention is described.

In the drawings similar reference characters refer to similar parts in all the views, in which- Figure 1 is al side elevation of my sewing machine.

Fig. 2 is a plan view of Fig. 1.

Fig. 3 is a fragmentary sectional elevation showing the construction.

Fig. 4 is a sectional view on the line 4-4 of Fig. 3.

Fig. 5 is a fragmentary sectional View illustrating the means for adjusting the throw of the link operating the needle bar frame.

' Fig. 6 is an enlarged sectional view on the line 6 6 of Fig. 5.

By referring to the drawings, it will be seen that the sewing machine is provided with a frame 10 having a bearing 11 in which there is journaled a main shaft 12, a bevel gear 13 being secured to the shaft 12 and meshing with a bevel gear 14 on a shaft 15 journaled in a bearing 16 in the main frame.

Mounted on the shaft 15 and secured for rotating therewith, there is a collar 17 having a transverse guideway 18 in which there is disposed a guide 19 on a base 20 of a spindle 21. There is a stop 17a on the collar 17 to limit the movement of the base 2O of the spindle 21 in one direction. The spindle 21 is journaled in a bearing 22 on a laterally extending arm 23, there being a threaded orifice 24 in the end of the arm 23 in which meshes a screw 25, the said screw 25 being disposed through an orifice 26 in an eccentric 27. Straps 28 are disposed around the eccentric v27" and are secured to end 29 of Specification of Letters Patent.

Patented Feb. 17, 1920.

Serial No. 240,654.

a link 30. The other arm of the link 30 is articulated at 31 to an arm 32 of a needle bar frame 33, which is pivoted at 34 to the main frame 10.

It will be understood that when the spindle 21 is co-axial with the shaft 15, rotation of the main shaft 12 will not operate the arm to move the needle bar frame by means of the link 30, but that when the base of the spindle 21 is moved to a position where the spindle 21 is eccentric relatively to the shaft 15 and is secured in this position by means of the set screw 35, which is disposed in a threaded orifice 36 in the collar 17 and which engages the guide 19 on the base 20, that with the rotation of the main shaft 12, the' spindle 21 will be given a rotary movement which will reciprocate the link 30 and rock the needle bar frame 33 on its pivot 34.

When this rocking movement of the needle bar frame 33 is to be increased, the screw is turned slightly to permit of the rotation of the eccentric 27 relatively to the arm 23. The screws 37 which hold the straps 28 in position are turned when the eccentric may be rotated on the screw 25 and relatively to the arm 23, so that the link may be moved from the full lines shown in Fig. 5 to the dotted lines shown in the said figure, and without rotating the spindle 21.

When the correct adjustment has been obtained, the screws 37 and 25 are turned home. Fulcrumed at 38 to the main frame 10, there is a lever 39, to the arm 40 of which there is articulated a bent link 41 which is secured in adjusted position to the needle bar frame 33, by means of a bolt 42 which is disposed through an orifice in the bent link 41 and which eXtends through a slot 43 in the arm 32 of the needle bar frame 33. The bent link 41 may be adjusted relatively to the arm 32 by moving the bolt 42 as may be desired in the slot 43. The other arm 44 of the lever 39 is connected with an arm 45 by means of a link 46, the said arm 45 being secured to a rod 47 which is slidable in bearings 48 on the main frame 10. The main shaft 12 has a longitudinal slot 49 in which is slidably disposed a key or member 50 to which is secured a disk 51. The said disk 51 has an opening through which the shaft 12 is disposed. Disposed at the sides of the disk 51 there are disks 52 which are mounted on a base 5 3 which is secured for movement with the rodflf The looper 54 is carried by the key or member 50, and it will be seen that while it will rotate with the shaft 12, it will also be reciprocated when the spindle 21 is eccentric relatively to the shaft 15. The disks 52 carry a bed plate member 55 which slides in a slot in the bed plate 56 and which is provided with an orifice 57 through which the needle 58 may move. The said needle 58 is carried by a needle bar 59, slidable in bearings 60 in the needle bar frame 33. The needle bar 59 is connected with the needle bar lever 61 by alink 62 and the needle bar lever 61 is pivoted to the main frame 10 at 63. This needle bar lever .61 is rocked in the usual manner by a link 64 articulated at one end to an arm of the needle bar lever 61 and connected by a strap 65 with an eccentric whichis mounted on the main shaft 12 at 66.

It will be seen that the needle bar 39 is reciprocated and the looper 54 is rotated by the rot-ation of the main shaft 12 and independently' of the means which arel provided for rocking the needle bar frame 33 and for reciprocating the looper 54, and, therefore, the sewingi machine may be used in the usual manner 'or sewing a straight stitch, and, when desired, the spindle 21 may be moved to a position eccentric. relatively to the shaft 15 which will rock the needle bar frame 33 by means of the link 30, and with this rocking movement of the needle bar frame 33, the looper 54 and the bed plate member 55 will be reciprocated by means of the link 41, the lever 39, the link 46, the rod 47 and the disk 52.

As a convenient means for moving the Vspindle 21 to an eccentric position relatively to the shaft 15, 1 provide a lever 67 which is pivoted to the main frame 16 at 68, this lev r 67 being disposed in a slot 69 inthe rod 47 and articulated in the said slot by means of a pin 70 which is secured in orifices in the rod 47 and which serves as a pointer to determine the relative position of the rod 47. Marks 71 are made on the main frame 10 to assist in determining this position of the rod.4 As the rod 47 is connected by the means which have been described with the spindle 21, the dist-ance that the said spindle 21 is moved laterally relatively to the shaft 15 may be determined by the movement of the pin 70 relatively to the marks 71 on the main frame 10. To assistin the movement of Y the spindle to aposition eccentric relatively to the shaft 1 5, the shaft 15 may be rotated slightly. y y

The feeder 72 is of thevusual construction and is operated through themain shaft l2 in the usual manner.

`Y The zigzag stitch referred to in the specification isa cross stitch such as may be used advantageously in the stitching` together of straw, braid or other materials and for sew ing binding wire to hats. However, it will of course be understood that the zigzag stitch referred to may be used for other purposes.

Having thus described my invention, I claim as new and desire to secure by Letters Patent;

1. In a sewing machine, a mainframe, a main horizontal shaft j ournaled in bearings in the main frame, a vertical shaft journaled in bearings in the main frame, means by which the vertical sha-ft is operable by the the first shaft, an eccentric on the second shaft, a needle bar frame pivoted on a transverse axis on the main frame, a reciprocating looper, and means operable by the eccentric to move the needle bar frame relatively to the main frame and to reciprocate the looper.

2. ln a sewing machine, a main frame, a main shaft journaled in bearings in the main fra ne, second shaft journaled in the main frame and having a transverse groove, means by which the second shaft is rotated by the first shaft, a spindle with a base *having a transverse member slidable in the transverse groove, means to secure the spindle at its base in adjusted position relatively to the second shaft, a needle bar frame movably mounted on the main frame, a reciprocating looper keyed to the main shaft, and means operable by the spindle when it is eccentric relatively to the second shaft to move the needle bar frame relatively to the main frame and to reciprocate the looper on the main shaft synchronously.

3. In a sewing machine, a main frame, a main shaft journaled in the main frame, a second shaft journaled in the main frame and rotatable by the main shaft, a spindle adjustable radially'of the axis of the second shaft, means to secure the spindle in adjusted position, a needle bar frame movably mounted on the main frame, a reciprocating looper,

Ythe needle bar frame, and means by which the main shaft is adapted to operate the. needle. bar and to operate the looper. Y

4. In a sewing machine, a main frame, av shaft journaled in the main frame, a spindle adjustable radially of the aXis of the shaft, means to secure the spindle to the shaft inradju'sted position, a needle bar frame movably mounted on the main frame, a looper mounted for synchronous movement with the needle bar frame, a needle bar slidable in the needle bar frame, means operable by the spindle when it is eccentric relatively to the shaft to move the needle bar frame relatively to the main frame and to move the looper synchronously therewith,

and mea-ns to move theneedle bar in the needle bar frame and to move the looper synchronously therewith.

5. In a sewing machine, a main frame, a main shaft journaled in the main frame, a second shaft, means by which the second shaft is driven by the first shaft, a spindle adjustable radially relatively to the second shaft, means to secure the spindle in adjusted position, a needle bar frame movably mounted on the main frame, a looper keyed tothe main shaft and slidable longitudinally thereof, a needle bar slidable in the needle bar frame, means operable by the spindle when it is eccentric relatively to the second shaft to move the needle bar frame relatively to the main frame and to slide the looper on the main shaft, and means to operate the needle bar in the needle bar frame.

6. In a sewing machine, a main frame, a shaft journaled in .the main frame, a spindle adjustable radially of the axis of the shaft, means to secure the spindle to the shaft in adjusted position, a needle bar frame movably mounted on the main frame, a looper, a rod slidable in bearings in the main frame, means connecting' the rod with the looper for movingV the latter synchronously with the needle bar frame, a needle bar slidable in the needle bar frame, means operable by the spindle when it is eccentric relatively to the shaft to move the needle bar frame relatively to the main frame and to move the rod longitudinally, and means to move the needle bar in the needle bar frame and to operate the looper.

7. In a sewing' machine, a main frame, a shaft journaled in the main frame, a spindle adjustable radially of the axis of the shaft, means to secure the spindle to the shaft in adjusted position. a needle bar frame movably mounted on the main frame, a looper, a rod slidable in bearings in the main frame, means connecting` the rod with the looper for moving the latter synchronously vvith the needle bar frame, a needle bar slidable in the needle bar frame, means operable by the spindle when it is eccentric relatively to the shaft to move the needle bar frame relatively to the main frame and to move the rod longitudinally, means to move the needle bar in the needle bar frame and to. operate the looper, and a lever pivoted to the main frame and articulated to the rod.

8. In a serving` machine, a main frame, a shaft journaled in the main frame, a spindle adjustable radially lof the axis of the shaft, means to secure the spindle to the shaft in adjusted position, a needle bar frame movably mounted on the main frame, a needle bar for movement in the needle bar frame, a looper mounted for synchronous movement With the needle bar frame, an arm having a bearing in which the spindle is disposed,a link connecting the arm with the needle bar frame for operating the latter, means connecting the needle bar frame with the looper formoving the latter synchronously With the needle bar frame, and means to move the needle bar in the needle bar frame and to move the looper to coperate therewith.

9. In a sewing machine, a main frame, a shaft journaled in the main frame, a spindle adjustable radially of the axis of the shaft, means to secure the spindle to the shaft in adjusted position, a needle bar frame movably mounted on the main frame, a looper mounted for cooperative movement With the needle bar frame, a needle bar slidable in c the needle bar frame, means operable by the spindle when it is eccentric relatively to the shaft to move the needle bar frame relatively to the main frame, a lever pivoted to the main frame, a link connecting one arm of the lever with the needle bar frame, a rod slidable in bearings in the main frame, means mounted on the rod for moving the looper synchronously With the needle bar "frame, a link connecting` the other arm of the lever with the rod, and means to move the needle bar the needle bar frame and to move the looper yte coperate thcrev-rith.

l0. In a sewing machine, a main frame, a main shaft ournaled in the main frame, a second shaft, means by which the second shaft is driven by the shaft, spindle adj ust-able radially relatively to the second shaft, means to secure the spindle in adjusted position, a needle bar frame movably mounted on the main frame, a looper keyed to the main shaft and slidable longitudinally thereof, a needle bar slidably disposed in the needle bar frame, means operable by the spindle When it is eccentric relatively to the second shaft to move the needle bar frame vrelatively to thc main frame, a lever pivoted main shaft for moving the needle bar in the l needle bar frame.

l1. In a sewing machine, a main frame, al main shaft journaled'in the main frame, a second shaft, means by Which the second shaft is driven by the first shaft, a spindle adjustable radially relatively to the second shaft, means to secure the spindle in adjusted position, a needle bar frame movably mounted on the main frame, a looper keyed to the main shaft and slidable longitudinally thereof, a needle bar slidably disposed in the needle bar frame, means operable by the spindle when it is eccentric relatively to the second shaft to move the needle bar frame relatively to the main frame, a lever pivoted to the main frame, a link connecting one arm of the lever With the needle bar frame, a rod slidable in bearings in the main frame, means mounted on the rod for moving the looper longitudinally of the main shaft, a link connecting' the other arm of the lever with the rod, means operable by the main shaft for moving` the needle bar in the needle bar frame, and a lever pivoted to the main trame and articulated to the rod.

l2. ln a sewingmachine, a main trame, a shaft journaled in the main frame, a spindle adjustable radially of the axis of the shaft, means to secure the spindle to the shaft in adjusted position, an arm having a bearing in which the spindle is journalechan eccentric rotatably mounted on the arm, means to secure the eccentric to the arm in adjusted position, .a needle bar frame movably mounted on the main frame, a looper mounted for synchronous movement with the needle bar frame, a needle bar slidable in the needle bar irame, a link havinga strap at one end secured around the eccentric and with its other end articulated to the needle bar iframe, means to move the looper synchronously with the needle bar frame, and means to move the needle bar in the needle far frame and the looper to coperate therewith.

13. In a sewing machine, a main frame, a shaft journaled in the main Jframe, a spindle adjustable radially of the axis oi the shaft, means to secure the spindle to the shaft in adjusted position, a needle bar frame movably mounted on the main frame, a loopei mounted for synchronous movement with the needle bar frame, a needle bar slidable 'in the needle bar frame, means operable by the spindle when it is eccentric relatively to the shaft to move the needle bar frame relatively to the main trame, and means tomove the needle bar in the needle bar trame and to move the looper for coperatingthere` ivith.

14. In a sewing machine, a main frame, a shaft journaled in the main trame, a spindle adjustable radially of the aXis of the'shatt, means to secure the spindle to the shaft in adjusted'position, a needle bar frame movably mounted on the main frame, a looper mounted for synchronous movement With the needle bartrame, a bed pla-te section havf ing an orifice for the needle and mounted for synchronous movement With the needle bar frame and the looper, 'a needle bar slid able in the needle bar frame, means operable by the spindle when it is eccentric relatively to the shaft te move the needle bar trame relatively to the main frame and to move the looper and the bed plate section synchronously therewith, and means to move the needle bar in the needle bar frame and to operate the looper for coperating with the needle bar. I

l5. In a sewing machine a sha-tt having` an eccentric, a needle bar frame pivoted on a horizontal axis, an arm having a bearing` in Which the eccentric is disposed, a link connectingj)- the arm With the needle bar trame for operating the latter, looping means 'for cooperating with a needle mov` ably mounted in the needle bar trame, and means operable by the needle bar frame for actuating` the looper.

` JOHN PARTMANN. 

